Underground-cavern-group-construction-schedule simulating optimization method based on ventilation numerical simulation

Abstract

The invention discloses an underground-cavern-group-construction-schedule simulating optimization method based on ventilation numerical simulation. The underground-cavern-group-construction-schedule simulating optimization method includes the following steps that (1) ventilation numerical simulation and the underground-cavern-group construction schedule are combined, and an underground-cavern-group-construction-schedule simulating optimization mathematical model based on ventilation numerical simulation is established; (2) an underground-cavern-group-construction-ventilation two-phase-flow hybrid simulation theoretical method is provided; (3) an underground-cavern-group-construction-ventilation numerical simulation parameter base is established; (4) an underground-cavern-group-construction-ventilation three-dimensional fine physical model is established, and grids are divided; (5) underground-cavern-group-construction-ventilation two-phase-flow hybrid simulation under different excavation schedules is achieved; (6) simulating optimization analysis of underground-cavern-group-construction whole process is carried out in cooperation with the ventilation numerical simulation result. According to the underground-cavern-group-construction-schedule simulating optimization method based on ventilation numerical simulation, the whole wind flow structure, pollutant space distribution and the dynamic variation rule in cavern groups are solved, and wind-flow-field transient pulsation information and the dust particle dispersion mechanism of ventilation difficulty areas can also be obtained.

Description

technical field [0001] The invention belongs to the technical field of underground engineering construction, and in particular relates to a method for simulating and optimizing the construction progress of an underground cavern group based on numerical simulation of ventilation. Background technique [0002] Underground engineering construction is an extremely complex process, especially for underground cavern group projects, the construction process is a complex system with random factors, which not only faces problems such as large excavation volume and complex construction conditions, but also involves Various digging methods and other difficulties. Therefore, it is necessary to systematically analyze and study various factors in construction, coordinate the relationship between various construction links, make the construction plan more reasonable, and achieve the purpose of fast, economical and safe construction. Using the whole process simulation technology to analyze...

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Problems solved by technology

[0006] From the above, it can be seen that there is currently a lack of research on the scientific value of ventilation time for underground cavern group construction based on ventilation numerical simulation, and the numerical simulation of ventilation in related underground projects mostly focuses on single-phase flow

In addition, the current two-phase flow construction ventilation simulation studies are all based on the Reynolds time-average simulation of the construction ventilation process. The results obtained are the overall air flow structure in the cavern group, the spatial distribution and dynamic change of pollutants, and it is impossible to simulate the underground The transient pulsation information of the wind flow field and the dispersion mechanism of dust particles in the cavern connection, corner, dead corner and other difficult ventilation areas in the cavern group

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